Ilmenite type nano-crystalline Co–Ti–O ternary oxides: sol–gel thin film on borosilicate glass, characterization and photocatalytic activity in mineralization of reactive red 198

Habibi, Mohammad Hossein; Shojaee, Elahe

doi:10.1007/s10854-017-6542-1

Cited by 8 publications

(3 citation statements)

References 33 publications

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“…The FTIR spectrum exhibited bands between 640 and 450 cm −1 , which is due to Ti–O–Ti and Co–Ti–O band formation [ 44 ]. The strong band at around 431 cm −1 corresponds to the bond of Co–O [ 45 ]. Maensiri et al [ 46 ] and Rashad et al [ 47 ] stated that the peaks in the range of 450–600 cm −1 were ascribed to the Ti–O–Ti bond.…”

Section: Resultsmentioning

confidence: 99%

Influence of Nanosized CoTiO3 Synthesized via a Solid-State Method on the Hydrogen Storage Behavior of MgH2

et al. 2022

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Magnesium hydride (MgH2) has received outstanding attention as a safe and efficient material to store hydrogen because of its 7.6 wt.% hydrogen content and excellent reversibility. Nevertheless, the application of MgH2 is obstructed by its unfavorable thermodynamic stability and sluggish sorption kinetic. To overcome these drawbacks, ball milling MgH2 is vital in reducing the particle size that contribute to the reduction of the decomposition temperature. However, the milling process would become inefficient in reducing particle sizes when equilibrium between cold-welding and fracturing is achieved. Therefore, to further ameliorate the performance of MgH2, nanosized cobalt titanate (CoTiO3) has been synthesized using a solid-state method and was introduced to the MgH2 system. The different weight percentages of CoTiO3 were doped to the MgH2 system, and their catalytic function on the performance of MgH2 was scrutinized in this study. The MgH2 + 10 wt.% CoTiO3 composite presents the most outstanding performance, where the initial decomposition temperature of MgH2 can be downshifted to 275 °C. Moreover, the MgH2 + 10 wt.% CoTiO3 absorbed 6.4 wt.% H2 at low temperature (200 °C) in only 10 min and rapidly releases 2.3 wt.% H2 in the first 10 min, demonstrating a 23-times-faster desorption rate than as-milled MgH2 at 300 °C. The desorption activation energy of the 10 wt.% CoTiO3-doped MgH2 sample was dramatically lowered by 30.4 kJ/mol compared to undoped MgH2. The enhanced performance of the MgH2–CoTiO3 system is believed to be due to the in situ formation of MgTiO3, CoMg2, CoTi2, and MgO during the heating process, which offer a notable impact on the behavior of MgH2.

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Section: Resultsmentioning

confidence: 99%

Influence of Nanosized CoTiO3 Synthesized via a Solid-State Method on the Hydrogen Storage Behavior of MgH2

et al. 2022

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“…%. The crystallographic phases of the composites at different annealing time and commercial CoTiO 3 were investigated by XRD [49,54]. The diffraction peak at 26.6°…”

Section: Physicochemical Characterization Of Cotio 3 /Nrgo Compositesmentioning

confidence: 99%

“…CoTiO 3 has the ilmenite structure with the Co 2+ and Ti 4+ ions occupying alternating layers perpendicular to the trigonal c axis of the unit cell [49]. Its structure has the hexagonal close packing of the oxide anions with two-thirds of the octahedral sites occupied by both Co 2+ and Ti 4+ cations.…”

Section: Introductionmentioning

confidence: 99%

CoTiO3/NrGO nanocomposites for oxygen evolution and oxygen reduction reactions: Synthesis and electrocatalytic performance

Luque-Centeno

Martı́nez-Huerta

Sebastián

et al. 2020

Electrochimica Acta

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Oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts play an important role in energy conversion and storage devices, but highly active and robust nonprecious metal catalysts are required to address the cost and durability issues. In this work, a modified gel methodology has been used to obtain nanocomposites of perovskite CoTiO 3 and N-doped reduced graphene oxide (NrGO). Moreover, the influence of the annealing extent in the synthesis has been studied. The composites show higher activity in oxygen evolution and reduction reactions in alkaline environment compared to sole ilmenite, which is related to a strong interaction between cobalt titanate and NrGO carbon matrix. The annealing duration appears as a key variable to modulate the physicochemical properties and the electrochemical behavior. The composite prepared at the largest duration (3 hours) exhibit enhanced bifunctional properties for ORR and OER, with onset potentials of 0.93 V and 1.53 V vs. RHE respectively, which is mainly attributed to higher concentration of nitrogen, larger extent of defects and/or the presence of more oxidized Co species in the nanocomposite.

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Interfacial-engineered CoTiO3-based composite for photocatalytic applications: a review

Imanuella

Witoon

Cheng³

et al. 2022

Environ Chem Lett

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Ilmenite type nano-crystalline Co–Ti–O ternary oxides: sol–gel thin film on borosilicate glass, characterization and photocatalytic activity in mineralization of reactive red 198

Cited by 8 publications

References 33 publications

Influence of Nanosized CoTiO3 Synthesized via a Solid-State Method on the Hydrogen Storage Behavior of MgH2

Influence of Nanosized CoTiO3 Synthesized via a Solid-State Method on the Hydrogen Storage Behavior of MgH2

CoTiO3/NrGO nanocomposites for oxygen evolution and oxygen reduction reactions: Synthesis and electrocatalytic performance

Interfacial-engineered CoTiO3-based composite for photocatalytic applications: a review

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